Caldew's resentment waned under this compliment to his professional skill.

"The trick would have worked, too, if I hadn't been called downstairs," he said. "The girl was quick enough to get into the room while I was out of it. Not that it mattered much, as things turned out, but it is a strange thing about this necklace, isn't it?"

"Very. Has Merrington told you all about it?"

"Yes, and he gave me a rare wigging for not discovering the loss. Between ourselves, I do not think that I was treated quite fairly about it. Miss Heredith never said a word to me about a jewel-case being in the room. She took it downstairs before I arrived, and never mentioned it when I asked her if anything had been stolen. If she had told me I should have had the case opened. But that didn't weigh with Merrington. He's beastly unfair, and never loses a chance to put the blame on to somebody else when anything goes wrong."

"I am sorry if you got into trouble through my action in informing him," said Colwyn. "But of course you must realize that a discovery of such importance could not be kept secret."

"That's quite true," replied Caldew, in a softened voice. "Fortunately, it does not affect the issue, one way or another. Mr. Heredith believes that Hazel Rath is innocent, and I suppose that is why he has called you into the case. But she is guilty, right enough. I tried to make that clear to Mr. Heredith, but he appears to be a man of fixed ideas. The question is, what has become of the necklace? My own impression is that she has hidden it somewhere. She had no opportunity to dispose of it before she was arrested."

"That means that you think she has stolen it."

"Why, of course—" Caldew's confident tone died away at the expression of his companion's face. "Don't you?"

"I do not."

"Why not?"